# 2024 São Léo Open – Singles

Juan Pablo Varillas was the defending champion but lost in the semifinals to Enzo Couacaud.
Daniel Vallejo won the title after defeating Couacaud 6–3, 6–2 in the final.

## Seeds

* Juan Pablo Varillas (semifinals)
* Thiago Monteiro (first round)
* Camilo Ugo Carabelli (quarterfinals)
* Felipe Meligeni Alves (semifinals)
* Román Andrés Burruchaga (withdrew)
* Genaro Alberto Olivieri (second round)
* Geoffrey Blancaneaux (first round)
* Gonçalo Oliveira (quarterfinals)
* Gustavo Heide (withdrew)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Juan Pablo Varillas | 6 | 4 | 6$^2$ | | | | |
| | Enzo Couacaud | 2 | 6 | 7$^7$ | | | | |
| | Enzo Couacaud | 2 | 6 | 7$^7$ | | Enzo Couacaud | 3 | 2 |
| | | | | | WC | Daniel Vallejo | 6 | 6 |
| 4 | Felipe Meligeni Alves | 4 | 6 | 0 | WC | Daniel Vallejo | 6 | 6 |
| WC | Daniel Vallejo | 6 | 3 | 6 | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | JP Varillas | 7 | 7$^7$ | | | | | | | | | | | | | | | | |
| LL | G Villanueva | 5 | 6$^0$ | | 1 | JP Varillas | 7$^7$ | 5 | 6 | | | | | | | | | | |
| | G Bueno | 2 | 5 | | Q | LJ Rodríguez | 6$^2$ | 7 | 3 | | | | | | | | | | |
| Q | Lorenzo Joaquín Rodríguez | 6 | 7 | | | | | | | 1 | JP Varillas | 6 | 7$^7$ | | | | | | |
| | G Mager | 3 | 6 | 7$^7$ | | | | | | 8 | G Oliveira | 4 | 6$^4$ | | | | | | |
| WC | D Dutra da Silva | 6 | 3 | 6$^3$ | | G Mager | 6$^5$ | 2 | | | | | | | | | | | |
| | JL Reis da Silva | 5 | 3 | | 8 | G Oliveira | 7$^7$ | 6 | | | | | | | | | | | |
| 8 | G Oliveira | 7 | 6 | | | | | | | | | | | | 1 | JP Varillas | 6 | 4 | 6$^2$ |
| 3 | C Ugo Carabelli | 6 | 3 | 6 | | | | | | | | | | | | E Couacaud | 2 | 6 | 7$^7$ |
| | Á Guillén Meza | 3 | 6 | 4 | 3 | C Ugo Carabelli | 6 | 3 | 6 | | | | | | | | | | |
| Q | D Cukierman | 7 | 6 | | Q | D Cukierman | 3 | 6 | 4 | | | | | | | | | | |
| Alt | C Sánchez Jover | 5 | 2 | | | | | | | 3 | C Ugo Carabelli | 2 | 6 | 2 | | | | | |
| | Alexander Weis | 3 | 4 | | | | | | | | E Couacaud | 6 | 1 | 6 | | | | | |
| | A Collarini | 6 | 6 | | | A Collarini | 1 | 6 | 4 | | | | | | | | | | |
| | E Couacaud | 6 | 7$^7$ | | | E Couacaud | 6 | 3 | 6 | | | | | | | | | | |
| Q | E Gómez | 4 | 6$^3$ | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | G Blancaneaux | 3 | 2 | | | | | | | | | | | | | | | | |
| | M Pucinelli de Almeida | 6 | 6 | | | M Pucinelli de Almeida | 6 | 2 | 7 | | | | | | | | | | |
| | JC Prado Ángelo | 6 | 0 | 6 | | JC Prado Ángelo | 2 | 6 | 5 | | | | | | | | | | |
| Alt | B Bobrov | 4 | 6 | 2 | | | | | | | M Pucinelli de Almeida | 6 | 5 | 6$^4$ | | | | | |
| | R Olivo | 3 | 3 | | | | | | | 4 | F Meligeni Alves | 3 | 7 | 7$^7$ | | | | | |
| WC | M Alves | 6 | 6 | | WC | M Alves | | | | | | | | | | | | | |
| Q | K Uchida | 6$^7$ | 6 | 3 | 4 | F Meligeni Alves | w/o | | | | | | | | | | | | |
| 4 | F Meligeni Alves | 7$^9$ | 2 | 6 | | | | | | | | | | | 4 | F Meligeni Alves | 4 | 6 | 0 |
| 6 | GA Olivieri | 6 | 6 | | | | | | | | | | | | WC | AD Vallejo | 6 | 3 | 6 |
| Q | JB Torres | 2 | 4 | | 6 | GA Olivieri | 1 | 4 | | | | | | | | | | | |
| WC | AD Vallejo | 6 | 5 | 7 | WC | AD Vallejo | 6 | 6 | | | | | | | | | | | |
| | L Draxl | 2 | 7 | 5 | | | | | | WC | AD Vallejo | 6 | 6 | | | | | | |
| | P Sakamoto | 6 | 6 | | | | | | | Alt | O Luz | 3 | 1 | | | | | | |
| Q | B Kuzuhara | 2 | 0 | | | P Sakamoto | 4 | 6 | 4 | | | | | | | | | | |
| Alt | O Luz | 4 | 6 | 7 | Alt | O Luz | 6 | 4 | 6 | | | | | | | | | | |
| 2 | T Monteiro | 6 | 3 | 5 | | | | | | | | | | | | | | | |